Porsche 911 GT3 R (991)

TYRES

• Slick, Front 26.8 PSI, Rear 26.3 PSI, tyre blanket 80°C both axles. Optimal operating window for Dry (V10-spec) compound: 85–100°C, peak grip at ~90°C core temp — for a single hot lap, target getting fronts to 90-95°C and rears to 88-92°C within first sector for peak grip on lap 2.

ELECTRONICS

• TC1: 4
• TC2: 2
• ABS: 5
• Engine Map: 1 (max power, qualifying)
• Brake Bias: 56.5%
• Brake Driver Sensitivity: 80%

SUSPENSION

• // FRONT
• Ride Height: 55mm
• Wheel Rate FL / FR: 175 N/mm / 175 N/mm
• ARB: 5
• Brake Torque Multiplier: 100%
• Brake Bias: 56.5%
• // REAR
• Ride Height: 62mm
• Wheel Rate RL / RR: 155 N/mm / 155 N/mm
• ARB: 7
• Diff Preload: 70 Nm
• Diff Coast: 0.7
• Diff Power: 0.3

DAMPERS

AERO

• Front splitter: 6, Rear wing: 7, Brake ducts F/R: 3/3 — moderate cooling given single-lap heat build isn't a concern, biased toward less drag; rear wing raised above baseline for Cascades commitment and Old Hall load.

KEY SETUP NOTE

• The 992-derived rear-engine weight bias makes Cascades' blind, downhill, high-speed entry the defining moment of the lap — running slightly more rear wing (7) and stiffer rear ARB (7) than a "balanced" setup sacrifices a little Fosters exit traction for the confidence to carry full commitment through Cascades, where the time gain dwarfs the loss.

TRACK GUIDE

• Cascades (T1): Trust the rear — brake in a straight line before turn-in, blind downhill entry punishes any trail-braking rotation; commit early, let the stiffer rear ARB hold the platform.
• Shell Oils (T3): Late, hard brake into the hairpin, rotate on entry, get on power early even if slightly wide — traction out is worth more than the tightest line.
• Island (T5): Front turn-in is critical; use the slightly softer front springs to rotate the car early, then feed throttle progressively.
• Knickerbrook (T7): Stay full or near-full throttle through the S-complex crest — any lift unsettles the rear over the crest and costs the entire complex.
• Druids (T9) and Fosters (T12): Both are traction-limited exits feeding straights — prioritize a clean, early throttle application over outright minimum-speed apex, especially at Fosters since it feeds the pit straight.

THEORETICAL BEST LAP

• 1:34.200 — theoretical optimal sector composite, dry track, low fuel, qualifying tyres, no traffic.

REAL WORLD RECORD

• 1:34.960 — Ben Barnicoat, 2019, British GT Championship (GT3 qualifying, dry).

SIM RACING RECORD

• 1:33.700 — ACC, GT3 class, dry/